Key facts. Analysis Recognition Demodulation Decoding

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Analysis Recognition Demodulation Decoding go2decode is the standalone software for signal recognition, demodulation, decoding, voice detection, signal recording and technical signal analysis.

1 Analysis Recognition Demodulation Decoding go2decode is the standalone software for signal recognition, demodulation, decoding, voice detection, signal recording and technical signal analysis. Key facts Fully automatic processing of HF/VHF/UHF communication signals Knowledge based recognition approach, using the analysts know-how Wide range of universal demodulators and standard decoders Automatic processing of adaptive transmission methods Displays for monitoring and manual analysis of unknown signals Definition and customization of decoders with Decoder Description Language Signal acquisition from digital or analogous receivers via LAN /USB or audio Voice detection and demodulation Determination and continuous tracking of signal characteristics IF/AF-recordings Part of the product line

WORKFLOW RECEIVER DEMODULATION VISUALIZATION EDIT FILES DECODING VOICE LISTENING UNKNOWN SIGNALS COMPILATION SOMO RECORDING TEXT PARAMETER DEBUGGING SIGNAL SOURCES SIGNAL PROCESSING RESULTS MANUAL

2 WORKFLOW RECEIVER DEMODULATION VISUALIZATION EDIT FILES DECODING VOICE LISTENING UNKNOWN SIGNALS COMPILATION SOMO RECORDING TEXT PARAMETER DEBUGGING SIGNAL SOURCES SIGNAL PROCESSING RESULTS MANUAL ANALYSIS DECODER DEVELOPMENT go2decode Single channel decoder for automatic demodulation and production, technical signal analysis and decoder development Automatic signal processing of radio data and voice signals, decoding, recording More than 250 modes for demodulating and decoding Signal decoding from digital or analogous receivers via streaming, audio, fi les or internal signal buffer Manual identifcation and analysis of unknown signals Creation and modifi cation of decoders with Decoder Description Language (DDL) Integrated receiver control Easy integration through TCP/IP-based data interchange via LAN

With go2decode you analyse signals, adapt demodulator parameters, develop new decoders, set up new protocols and automate your monitoring tasks.

3 Your vision is our incentive go2decode is more than a single decoder software to analyse and monitor communication signals. The idea behind is to allow the user to adapt and automate their monitoring tasks, improving results and staying up to date with the signal scenario and current requirements. With go2decode you analyse signals, adapt demodulator parameters, develop new decoders, set up new protocols and automate your monitoring tasks. This way the analysts knowledge and experience gets incorporated into all monitoring solutions based on go2signals products for future automatic processing. SINGLE WORKPLACE AND SYSTEM SOLUTIONS Although go2decode is optimized for standalone applications, it is able to interact with other radio monitoring solutions based on go2monitor. Open interfaces allow for an easy TCP/IP based communication. The fi eld of application ranges from a single go2decode connected via the audio interface with a manual adjustable receiver to a system solution, comprising receiver controls, job interfaces, communication with other radio monitoring systems and a central database. 3

4 USE CASE: Adaptation of demodulation and decoder library KNOWN SIGNALS MODULATION TYPE PARAMETRIZE PATTERN EDIT UNKOWN SIGNALS SYMBOL RATE CONTROL CODING COMPILATION MALFUNCTIONING MODEM SHIFT OPTIMIZE CONTENT DEBUGGING RESULTS MODULATION ANALYSIS DEMODULATOR PARAMETRIZING CODE ANALYSIS DECODER DEVELOPMENT Use Cases Manual and automatic signal monitoring go2decode is used to observe a single frequency. Its signal detection and production is a multi-level process. The integrated Automatic Production Channel (APC) buffers the incoming signal continuously. Buffering allows lossless processing: detection, recognition and decoding without losing the first bit of an emission. If a signal is detected, the APC checks for the known modem types in its modem list. Signal parameters (e.g. center frequency and baud rate) are determined and displayed. Decoded text will be displayed as plain text or as a formatted XMLstream. Manual analysis of unknown signals New and unknown signals can be stored, manually or automatically. These records are used for signal analysis, measuring modulation and coding parameters. A comprehensive set of build in analysis tools with special modulation and coding analyzing features supports the operator, from the beginner up to the expert. Some examples of its possibilities: - Spectrogram and spectrum displays for FFT analysis and baud rate measurement - Autocorrelation display to find out signal repetitions - Constellation display for phase modulation analysis - Analysis display to measure amplitude, frequency and phase behavior - Hell display for coding analysis - Extensive set of cursor functions to measure harmonics 4

Adaptation of demodulator and decoder library go2decode differs to other analysis tools, enabling the operator to parametrize its set of universal demodulators.

5 Adaptation of demodulator and decoder library go2decode differs to other analysis tools, enabling the operator to parametrize its set of universal demodulators. The analysis functions can not only be used to analyse the input signals, they can also be used to monitor the internal processing of the demodulator. The operator is able to set up a demodulator on a new signal, parametrize the demodulator and control and optimize the demodulation process. The bits can be stored and transfered for extended stream analysis to other analysis tools (see go2analyse) or used as input data for the internal decoder. With the advanced Decoder Description Language, (DDL) new decoders can be created or existing ones can be modified. Therefore we deliver go2decode inclusive the DDL source code for many of our decoders. Just use them as a template or adapt them to your needs with the integrated DDL editor. An additional decoder debugger tool is part of the go2decode Professsional version. Information about the demodulator settings and the decoders can be stored as a modem description file extending the protocol library. Extending the list of modems for manual and automatic monitoring Just include your own generated protocols in the modem list used for signal monitoring. Thus, new and previously unknown signals can be recognized and processed automatically. Modem description files can also be used in go2monitor. In addition, go2decode is the perfect companion for go2monitor if signal analysis functions are required. go2analyse offers additional functions for low level code inspection. Main window of go2decode 5

6 FUNCTIONS DEMODULATION MODEM RECOGNITION TEXT DECODING RECORDING VOICE SIGNALS SIGNAL SOURCES SIGNAL PROCESSING RESULTS MANUAL ANALYSIS DECODER DEVELOPMENT Functions: Signal processing Automatic recognition and decoding go2decode s signal detection and production is a multi-level process. The incoming signal is buffered continuously. Buffering allows lossless demodulation in respect of time. The signal is checked in the modem list taking into account: detection, recognition, demodulation and decoding. The protocol type is automatically recognized and its content produced. Signal characteristics (e. g. center frequency and baud rate) are determined and displayed. Decoded text will be displayed as plain text or as a formatted XML-stream. Processing of voice signals A powerful voice detection module is integrated. The voice processing algorithms of go2decode are insensitive to wideband interferences caused by a thunderstorm. The sensitivity level itself can be parameterised. In addition to the decision voice yes or no the module determines the values for nominal frequency, voice pitch and modulation type. The voice transmission can be demodulated and stored in audio files for listening and further processing. All this is done in real-time and tailored to the typical COMINT signal scenario. 6

The recordings are started and stopped either via automatic triggers or manually by the operator.

7 Recording Beyond from the demodulation and decoding of radio signals, the recording of signals is an important task in daily work. Recorderd signals are the basis for manual technical analyses of unknown signals and for archiving the signals of interest. go2decode enables to record both, IF as well as AF after demodulation. The recordings are started and stopped either via automatic triggers or manually by the operator. The triggers supported by go2decode are configurable squelch, signal detection, modem recognition and voice detection. go2decode also allows to record the demodulated bit stream to a txt-file or a special go2de- CODE format (including meta data like the quality of each bit). HANDLING OF ADAPTIVE PROTOCOLS The multimodem feature describes and combines multiple modes used within modern protocols to one multimodem. Thereby adaptive radio signals using different modes can be produced as one signal without loss. The user can defi ne own multimodems or edit existing multimodems in a comfortable way. 7

8 FUNCTIONS MODULATION PHASE SYMBOL RATE PATTERNS FREQUENCY AMPLITUDE SHIFT SIGNAL SOURCES SIGNAL PROCESSING RESULTS MANUAL ANALYSIS DECODER DEVELOPMENT Functions: Signal analysis Manual signal analysis Precise measurements can be achieved with the displays provided by go2decode. With spectrum / spectrogram, spectrum, autocorrelation display, constellation display, time domain / eyepattern display all the important tools needed to determine the signal characteristics are available. The analysis display allows for the simultaneous interpretation of magnitude, frequency and phase of a signal to get an impression of the utilized modulation. The Hell display and the bit display show information about the used coding. In each display double, cross-hair or harmonic cursors are offered. This powerful functions can provide an in-depht analysis which is often required to setup new demodulators and decoders which may be applied for automatic decoding. Signal generator go2decode contains a software based solution to generate modulated signals. It s the perfect tool for operator training; simulation of signal scenarios, comparison of signals when analysing unknown signals, and testing of hardware and software. It generates a wide range of modulation types. Modulator parameters like frequency, symbol rate, pulse shape or burst length can be changed to situation-specific values. It is possible to modify the coding scheme and to edit the text or bit pattern used. Moreover, it serves to generate complex signal scenarios with many different signals in parallel and channel simulation which can be stored and reloaded. 8

9 FUNCTIONS FOR EASY OPERATION In each display double, cross-hair or harmonic cursors are available. Search frequency and bandwidth are shown as well as the nominal frequency in addition to the live signal currently being monitored in the spectrum / spectrogram display The absolute signal time is shown and switching between line and dot drawing mode is easily possible. Eye pattern display Analysis display Autocorrelation display Spectrum / spectrogram display Time display Constellation display Bit display Hell display Easy adjustment of the zoom factor with Ctrl + mouse wheel in the results and the bit display 9

10 FUNCTIONS COMPILER COMMANDS DDL EDITOR DEBUGGER CODING SIGNAL SOURCES SIGNAL PROCESSING RESULTS MANUAL ANALYSIS DECODER DEVELOPMENT Functions: Decoder development Decoder Description Language (DDL) For many reasons the user might wish to define and create own decoders or modify the integrated standard decoders. The evolutionary growing Decoder Description Language (DDL) is the suitable tool kit for this task. More than 100 commands e.g. for pre-processing, searching, reading, transformation and output formatting can easily be learned and used like a standard programming language. The set of commands is designed not only for plain detecting and synchronising tasks but also for complex channel decoding methods. All decoders supplied have been created on the basis of DDL. Operators can use the supplied sources as template for their own solutions. bit streams in a way, that the decoded message content is obtained in the end. This way, even modern channel decoding methods can be applied in a few steps only. The decoders can be deployed to other go2signals installations e.g. go2monitor. The DDL ensures a high decoding quality, i.e. fast synchronization, selectivity, easy error correction etc. Starting point is a demodulated bit stream produced with a correct parameterised demodulator. DDL allows to analyse and process these 10

Decoder development tools Decoders are preferably created and tested using specialised tools. This way, decoder developers obtain the best possible insight into the entire modem function flow.

The editor offers automatic command completion and context-sensitive help. Correct commands, functions and keywords are highlighted in colour for visual checks.

11 Decoder development tools Decoders are preferably created and tested using specialised tools. This way, decoder developers obtain the best possible insight into the entire modem function flow. go2decode s DDL based decoder development tools consists of an editor, a compiler and a debugger. The editor is used to create and modify the source code. The editor offers automatic command completion and context-sensitive help. Correct commands, functions and keywords are highlighted in colour for visual checks. In the event of syntax errors, the integrated compiler provides detailed error messages and it generates an executable decoder programme, if compilation is error free. In addition the debugger is used to verify the executable decoders. This application allows to analyse the decoding procedure in detail. In an advanced mode, the debugger can be operated with further analysing possibilities together with all signal processing components of the system. E.g. to analyse the behaviour of decoder-controlled demodulators when processing adaptive transmission methods or the interaction of several modems in automatic demodulation and decoding. Debugging of decoders with breakpoints The advanced mode of the Decoder Debugger allows for analysis of the interaction of decoders 11

12 Technical specifi cations Specifications overview Data acquisition Localization Documentation Recommended PC hardware OS Digital IF stream (complex baseband I/Q); Soundcard; Digital AF (WAV 8, 16, 32 Bit); Others on request English or German; Others on request PDF User manual / PDF Online-Help Notebook or Desktop; CPU: Intel i5, min. 2 GHz; Memory: 2 GByte RAM, HDD: 10 GB, Screen Resolution min x 1024 Pixel, Soundcard for analog IF input, 1 GBit/s Ethernet for digital IF input Windows 7 / bit, Linux (CentOS/Redhat 6/7) 64 bit Features Software Feature Alphabets Decoders Voice detection, demodulation, recording Demodulators Remarks Can be added to the decoder source code, free configurable Requires go2decode Standard or Professional Our list of standard, military and PMR decoders is subject to continuous development. You find a current list of available decoders on our website: Modulation types: AM, FM, USB, LSB Detection: voice yes/no Nominal frequency Voice Pitch Automatic audio demodulation and recording Analogue Selcal ASK 2, 4 ASK2PSK4 ASK2PSK8 ASK4PSK8 Chirp Clover II Clover 2000 Clover 2500 Coquelet DPSK 2, 4, 8, 16 A/B F1A FM / F3E F6/F7B FSK 2 matched FSK 2, 3, 4 disc. FSK 2,3 auto shift MSK / GMSK J3E (USB, LSB) LINK 11 MDPSK 2, 4, 8, 16 A/B MFSK 2 Morse MPSK 2, 4, 8, 16 A/B MT63 MultiModem MultiTone (FSKn) OFDM OQPSK Pactor II, III, IV PSK 2, 4, 8, 16 A/B PSK data aided (mode controlled by decoder) QAM 16, 32, 64, 128, 256 TFM3 THROB / THROBX Automatic frequency, amplitude and symbol rate control Fast equalizer using known training sequences (via DDL) Primary demodulation USB/LSB/AM/FM Automatic burst synchronization 12

13 Features Software Feature GUI Input Audio (DANA) Input Files (DANA) Remarks Easy and intuitive to operate user interface Input spectrogram with live audio Manual and automatic demodulator and decoder control Different analysis displays for manual signal analysis Specialized signal analyzing cursor measurement functions Modem editor with demodulator and decoder settings Decoder editor and compiler (DDL) Up to 10 MHz sampling rate (note: functionality may be limited for sampling rates higher than 2 MHz) Playlist (files) Loop mode IQ / real files Remove DC Filtering Mirror FM demodulation Time source (File/System clock) Sample rate converter Center frequency tuning Streaming TCP/IP Digital IF (complex baseband I/Q 32 Bit), Sampling rate <= 10 MHz (note: functionality may be limited for sampling rates higher than 2 MHz) Playback of standard wav files. Digital AF (WAV 8, 16, 32 Bit) Playback of Perseus and WiNRADiO WAV recordings with correct frequency display Input TCP/IP Streaming Signal recordings Compatible receivers Generic PROCITEC/PLATH format VITA 49 (on request) PXGF (on request) Types: IF / AF Start / Stop - Manual by operator - Automatic by trigger Trigger types - Configurable squelch level - Signal detected - Transmission method recognized - Transmission method unknown - Voice/Morse detected File formats: WAV AirSpy CommsAudit CA7851 Grintek GRX Lan IZT R3xxx series IZT R4000 (SignalSuite) Microtelecom PERSEUS NARDA NRA-3000 RX NARDA NRA-6000 RX NARDA IDA 2 PLATH SIR 2110/2115 PLATH SIR 5110/5115 R&S EM100 / PR100 RFSPACE SDR-14 RTLSDR/Noxon USB-sticks SDRplay RSP ThinkRF WSA WiNRADiO G31DDC WiNRADiO G33DDC WiNRADiO G39DDC Generic VITA 49 receiver support Other generic Winrad ExtIO supported receivers Note: not all listed receivers are supported with Linux operating systems 13

14 Technical specifi cations Features Software Feature ISO 9001:2015 Remarks Company is certified (not only hardware) License Output Sonagram Viewer (SoVi) ResultViewer (PMO) Signal Generator (SOMO) Decoder Development Soundcard Interface (DANA) Third party decoder Training USB-Dongle (WIBU-KEY/Codemeter) License sharing with license server Decoding results TXT-File with decoded text XML-File with decoded text and metadata Signal recordings Voice recordings Bitstream *.rec files (bits and quality of each bit) Bitstream *.txt files (bits) Standalone application for spectrum/spectrogram display Display of: Decoder output, demodulated audio files (CW, TETRA etc.), text output (ALE, HFDL, etc.), binary files For standard test signals. Requires go2decode-professional; detailed description see below Modification of standard decoders Definition of new decoders Integration of existing decoders, requires go2decode-standard or professional; detailed description see below Analog input WiNRADiO VSC Virtual-Audio-Cable (VAC) etc. Interface to the DDC channel output Interface to the bitstream output Streaming and control interface with DDL Very short training period Same technology as in large decoding systems 14

15 Analysis Analysis Items Displays Spectrum Spectrogram/Sonagram Autocorrelation I/Q Constellation Eye pattern Time domain (oscilloscope) with additional histogram Analysis (magnitude, frequency and phase) with additional histogram Hell Bit Signal squaring Squaring: 0, 1, 2, 3 Windowing Rectangle Hanning Hamming Kaiser Flat Top Blackman Cursors Harmonic Crosshair 2 cursor modes Center frequency Adjustable Operation modes Online / offline 15

16 Technical specifi cations Decoder Development (optional) Decoder Development Items Basic functions Function library Decoder Editor Compiler Debugger Modification of standard decoders Definition of new decoders Integration of existing decoders Pre-processing Symbol conversions Descrambling procedures Channel selections Pattern search Burst detection Forward/backward time jumps Deinterleaving Check and correction procedures: CRC, Hamming, Viterbi, BCH, Reed-Solomon Elementary arithmetic and bit manipulations Table handling Various output formats, alphabets, channels Control of demodulation and decoding Setting of demodulator parameters Selected voice codecs Branches and sub-routines (special functions on request) Soft decision Automatic command completion Content related help Syntax highlighting Generation of binary decoder files Detailed code check and error messages Debugging - Breakpoints on lines of code - Single-step mode for lines of code - Display of variable contents in various formats and displays - Editing of variable contents - Display of all input data packages - Display of internal data buffer and current read position Advanced analysis of recognition, demodulation and decoding - Breakpoints in several decoders of one modem list - Comparison of the decoder behaviour in search phase and decoding phase - Monitoring the current demodulator state 16

17 SOMO Signal Generator (optional) SOMO Signal generator Items Modulation generation Coding generation Channel simulation Output - Generation of single and multi channel, continuous and burst signals - Modulation types - ASKn - PSKn (single and multi channel) - QAMn (single and multi channel) - ASKnPSKm (single and multi channel) - NCPFSKn - FSKn (single and multi channel) - MSK (single and multi channel) - GMSK (single and multi channel) - F7B - TFM3 - TFM5 - Morse - Sine - Rectangle - Saw tooth - Triangle - input from.wav files - Primary modulation:usb, LSB, AM, FM - Variable modulation parameters - Attenuation - Center frequency - Baud rate - Pulse shapes: RC pulse, RC/RRC spectrum, Gauss pulse - Burst parameters Binary, Baudot, ASCII, HC ARQ, ITA2 Differential/absolute coding Convolutional encoding / Viterbi CCITT standards V.17 V.33 Variable bit stream, bit order, parity Various scrambling algorithms AWGN Multipath propagation: Watterson (ITU) and enhanced ITS model Soundcard / Wav Files / network stream Subject to modifications, available from software version

18 Order guide x = included o = as option available Automatic processing Signal analysis Software go2decode Light x x x o o Software go2decode Standard x x x x x o o Software go2decode Professional x x x x x x x o o Edit of demodulator / decoder Decoder Debugger Signal generator (SOMO) Recording / replay Standard set of decoders Set of military decoders ¹ Set of PMR decoders ² Export conditions: 1 In case of an export from the Federal Republic of Germany an export permission must be granted by the German authorities. Enduser certificate is required. 2 In case of an export from the European Union an export permission must be granted by the German authorities. Enduser certificate is required. 18

go2decode Training This training course familiarises the participant with all go2decode components and functions and their practical use. It focuses on delivery of basic knowledge and signal analysis.

19 go2decode Training This training course familiarises the participant with all go2decode components and functions and their practical use. It focuses on delivery of basic knowledge and signal analysis. Confi guration and parameter setting of demodulators and decoders for automatic detection of new modems will be explored in more depth. Skills will be gained in practical authentic situations using live signal recordings. This training offers the possibility to handle individual tasks and queries as well as discussing the signal samples provided by the participants. Training content: Field of application for go2decode Introduction to the user interface Fundamentals of digital signal modulation Use of signal analysis functions Creation of new transmission modes for automatic detection and production DDL Training In this training course, participants are introduced to the fundamentals of the Decoder Description Language (DDL). The essential functions will be explained in detail and the commands of this easy to learn programming language will be explained. Building on the participant s prior knowledge of the principles of channel coding and the fundamentals of bit error correction procedures, existing decoders will be modifi ed and adapted to individual requirements. Following this training course, participants will be able to modify and to create new decoders. This training course is adresses to technical employees who are familiar with programming, modifi cation and adaptation of signal decoding software. Training content: Creation and modifi cation of decoders Program structure, function and commands and interfaces of the DDL Use of the decoder debugging function Practical exercise: writing a simple decoder Methods for bit error recognition and correction 19

... monitoring a connected world PROCITEC GmbH Rastatter Strasse 41 75179

sales@procitec.de Further information on www.go2signals.de www.procitec.de 17.

20 ... monitoring a connected world PROCITEC GmbH Rastatter Strasse Pforzheim Germany Phone: Fax: sales@procitec.de Further information on /2018 (Subject to modifi cation) Management System ISO 9001:2015

Analysis Recognition Demodulation Decoding

Analysis Recognition Demodulation Decoding go2decode is the standalone software for signal recognition, demodulation, decoding, speech detection, signal recording and technical signal analysis. Key facts